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Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> 

For home TC use a good equation is:

2.5 x Erms of your power supply transformer.

Then you don't have to worry about failure and waste you time testing and
sorting out caps that might fail in the string.

Dr. Resonance

 > Original poster: "Christoph Bohr" <cb-at-luebke-lands.de>
 > Hello All.
 > I know this has bee widely discussed in the past, but the topic currently
 > got more interesting to me. But while searching the archives and the web I
 > found that opinions still differ a bit about that topic.
 > I want to make a replacement MMC during the next weeks to be run on a 12KV
 > RMS xformer. But I am still not sure how many caps per string I want to go
 > for.
 > The units are the commonly known 100nF, 1600VDC/650VAC. RMS current should
 > be withing range in my setup, but I just are not sure if I should go for
 > 11 or 12 caps for occasional runs of  some minutes.
 > Maybe there are any practical experiences with these caps, most
 > I found was on the CD caps which would cost me 20% more than the WIMA's
( ca
 > 1,80EU/pcs ).
 > Thanks a lot in advance.
 > Best regards.
 > Christoph Bohr